What is the meaning of erect?

verb

• Construct, build, or erect.
  • usage: "Raise a barn"
  • synonyms: raise, rear, set up, put up
• Cause to rise up.
  • synonyms: rear

adjective

• Upright in position or posture.
  • usage: "an erect stature"; "erect flower stalks"; "for a dog, an erect tail indicates aggression"; "a column still vertical amid the ruins"; "he sat bolt upright"
  • synonyms: vertical, upright
• Of sexual organs; stiff and rigid.
  • synonyms: tumid